Doorlock



Aug. 1-1, 1925. 1,549,602

E. O. MURMANN DooRLocx Ffled May 2. 1922 NVENToR.

BY M

A TTORNEYS.

Patented Aug. 11, 1925.

UNITED STATES EUGENE O. MURMANN, OF GLENDALE, (LALIFORNIA.`

DOORLOCK.

Application led May 2, 1922. Serial No. 557,945.

To all whom it may concern:

Be it known that I, EUGENE O. MUR MANN, a citizen of the United States, and resident of Glendale, in the county of Los Angeles and State of California, have inw vented new and useful Improvements in a Doorlock, of which the following is a specication.

Thisinvention relates to a door lock and pertains to a type of lock which may be embedded in the door and will serve the purpose of a mortise or rim lock. The primary object of this invention is to provide a lock which does not detractl from the appearance of the door and is simple in construction. Janother object of this invention is to provide a lock which requires a minimum` of labor and skill in its installation. i* further object of this invention is to provide a lock having a latch bolt adapted to be adjustably and dctachably coupled to the remainder of the lock mechanism which is preferably housed within a casing.

These objects together with other objects and corresponding` accomplishments are obtained by means of the embodiment of my invention illustrated in the accompanying drawing, in which:

Fig. 1 is a perspective view of a fragment of a door with my improved lock installed therein; Fig. 2 is a horizontal section through the door fragment shown in Eig. 2; and Fig. 3 is a fragmental perspective view of the coupler.

Referringmore particularly to the drawing, i indicates a door having a cylindrical recess 5 drilled therein from the edge. Intcrsecting this recess is a cylindrical opening extending from one side of the door to the other and indicated by 6.- This opening is designed to receive the lock casing. Disposed in the opening 6 is a cylindrical casing 7 containing a lock mechanism except for the bolt. The exact details of this lock are not pertinent to the invention. However, there is a coupler bar 8 which may be reciprocated by the cylinder. One side of the casing 7 has a plate 9 which overhangs the case and will engage the side of the door. The plate 9 has a keyhole for the reception of a key. An independent `plate 10 of a similar form is secured to the casing by means of screws 11. This plate carries a knob 12 which may be arranged to operate the bar 8. This is the usual inside knob for a lock. The casing 7 has an opening 1li to provide means of access to the coupler bar 8 and for coupling a bolt thereto. Disposed within the recess 5 is a latch bolt housing 15 of cylindrical form and having a square opening through which the bolt 16 projects and in which it is guided. The bolt 16 has the usual external appearance and secured to the back thereof is a stem 17 having a yoke 18 swivelled thereon. EX- tending between the arms of the yoke is a pin 19, and loose-ly mounted thereon is a draw bar 20. This bar is loosely mounted so that the effect is to provide a universal joint between the bolt and the bar. The draw bar has at its end oppositely disposed indentations to form in effect oppositely disposed serrations. In the bar 8 is a recess so that the bar 20 may be coupled to bar 8 in the manner indicated in Fig. 1. By this means a variation in the width of the door and in the fitting of parts may be provided for. Due to the universal joint connection between the bar 2O and the bolt, the latter will not become wedged in its housing.

lVhat I claim is:

1. In a door lock, a bolt, a case having a reciprocable coupler bar, a draw bar secured to said bolt by an articulation and having an adjustable coupling means for detach- 1bly connecting said bolt and said coupler 2. In a door lock, a bolt, a case having a reciprocable coupler bar, a draw bar secured to said bolt by a universal joint, said draw bar having adjustable coupling means for connection to said bolt coupler bar.

3. In a door lock, a bolt, a case having a reciprocable coupling comprising a bolt coupler bar having a slot, a draw bar secured to said bolt and having a serrated coupling end for disposal in said slot.

4. In a door lock, a bolt, a case having a reciprocable coupling comprising a bolt coupler bar having a slot, a draw bar secured to said bolt by a universal joint, said draw bar having a serrated coupler end for disposal in said slot.

In witness that I claim the foregoing I have hereunto subscribed my name this 24th v day of April, 1922.

EUGENE O. MURMANN. 

